import io.reactivex.Observable;

public class C04 {
    public static void main(String[] args) {
        Observable<String> source = Observable.just("Alpha", "Beta", "Gamma", "Delta", "Epsilon");
        source.map(String::length)
              .filter(i -> i >= 5)
              .subscribe(s -> System.out.println("RECEIVED: " + s));
    }

}
//EOP
